Automatic cut-out for gas-burners.



J. A. L. DETERS.

AUTOMATIC CUTOUT FOR GASVBURNERS.

APPUCATION FlLED JUNE 29 1917.

Patented May 28,1918.

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AUTOMATIC CUT-OUT FOR GAS-BURNERS.

Specification of Letters Patent.

Patented May 28, 1918.

Application led .T une 29, 1917. Serial No. 177,634.

T0 all whom t may concern.'

Be it known that I, JOHN A.`L. Dn'rnns, a subject ofthe Emperor of Germany, resid ing at Chicago, inthe county of Cook and State of Illinois, have invented certaininew and useful Improvements in Automatic Cut- Outs for Gas-Burners, of which the following is a speoication.

My invention relates to an automatic controller for gas jets and the like and has for its primary object 'the provision of improved ymeans whereby the supply of gas may be automatically shut off from a burnerwhen the' flame is extinguished.

Other objects and advantages of my invention will become apparent from the'following description taken in conjunction with the accompanying drawings, which form a part of this specification and illustrate the preferred embodiment of the invention.

In the drawings: .y

Figure 1 is a fragmentary top plan view of a gas stove embodying the features of my invention Fig. 2 is a section approximately on line 2-2`of Fig. 1; n

Fig. 3 is a section on line 3-3 of Fig. 2;

Fig. -1 is a front elevation of an air plate forming part of my invention;

' the arms 11 which define a grid for the supu mixing chamber 15. Plate 18 may be fiat port of coolringvessels. A burner 12 issupported beneath the grid 11 by meansof an offset bracket 13 at its rearextremity and a suitably shaped bracket 111 near its forward end. The burner is provided with the usual mixing chamber 15 which carries a depending lip 16 pierced for engagement with ay threaded rod 17;T An 'air'plate 18 is pierced at its lower end for engagement by therod 17 and overlies the forward open end of the but preferably is bowedl outwardly,while the forward end of the chamber 15 defines a substautial kvertical plane. thus provided at opposite sides of the plate 18 whereby a sulic'ient quantity of air is ad# mitted intok the chamber 15, where it mixes with entering the chamber througha )et yturn easily upon the threads.

Air spaces 19 are 21. The plate 18 is apertured as at 22 to admit of the insertion of the jet 21 and to provide for admission of air, the aperture 22 being covered by a gate 23 which hangs on jet 21 and enlarges or reduces the air supply as the volume of gas increases or decreases. The aperture 22 admits into the mixing chamber the inner end of the jet 21 which is flared at both sides as yat 24 in order to spread the gas injected intol the chamber 15 and more thoroughly mix it with the air coming in from the sides of the forward end of the chamber and'from aperture 22. It will be noted that while I maintain the vertical internal diameter of the jet 21 substantially the same from end to end, the horizontal diameter of the jet is greatly increased at its discharge end in chamber 15, thus providing a fan shaped jet of gas in the mixing chamber. The lip 16 and plate 18 are bolted together upon rod 17 by means of lock nuts 25 and the outer end of rod 17 is threaded into a tapped boss 26011 the gas supply pipe 27. A vertically extendmg tapped boss 28 is provided on the gas pipe 27. This boss is engaged by a pipe 29 which is outwardly threaded for substantially half its length and carries a nut 31 adapted to The lower end lof pipe 29 ycommunicates with the kgas main 27, While the upper end is formed into a valve seat 32-pipe 29 being preferably formed of brass. A valve head 33 telescopes about the vsmooth upper end of pipe 29, the interior of the head-23 and pipe 29being such that the action of gravity will permit `movement of the head upon the pipe,and the head 33 is of suiiicient weight to instantly overcome thek pressure of `gas in pipe Mounted ywithin the head is a needle valve 34 which. when elevated as shown in full lines in Fig. 2, permits gas to flow from main 27 through pipe 29 rinto jet 21. The

yvalve 34 is preferably formed of a metal softer than them aterial of pipe' 29, so that it will constantly fit the valve seat The .l vertical elongation of aperture y22 is provided in order thatfjet 21m'ay be raised and theinterior of the tip 37 and is slightly less i movement.

flame.

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Traversing the burner at such a height above the saine as to be subjected instantly to the heat of the tlanie is a bar 35 `formed of alun'iinum, iron or any other substance which has a high coehcient ot linear expansion. The inner end ot' the rod is down bent as at-36 and tits in a vertical aperture provided in the bracket 13, thus anchoring the inner end et the rod against any horizontal The forward end ot' the rod terminates very close to the valve head 33 and is provided (see Figs. 2 and 3) with a rubber tip 37 the tip being held upon the rod preferably by 'means otl a curled sheet metal spring 33, Vwhich is compressed Within in interna-l diameter than the external diamter ot the rod 35. It will thus be seen that the spring 3S maintains the tip in lined position vupon Vthe end of rod 3? against any casual displacement While permitting a manual adjustment oit the tip upon the rod. Normally, that is when there is no llame from burner l), the cooled rod is ot such alength as to cause tip 27 to stand out of contact with valve head 33.

In the operation of the above described device the nut 3l is threaded upwardly on pipe 29 to lift the valve head, causing a discharge of gas from jet 2l and burner 35 is lighted, in the ordinaryk sense ot the term,

by the application of a match or any other The burner flame immediately heats rod 35 and lengthens it until it contacts With vthe valve head 33, thereby jamming the valve head upon the `smooth upper end of pipe 29 Wit-h sutlicientV force to prevent gravity induced `fall of the head. The nut 3l is noiv threaded. into the lower position indicated in dotted -linesin Fig, 2. In this position ot the arts the supply of gas to the burner and the game from the burner are continuous inasmuch as valve 34C, which is Xed to valvev head 33, `is :held in elevated position 'by the 'interposition of rod 35 between bracket 13 and valve head 33. Iiet it be assumed that a pot of Water is heating upon the grid ll and, Vin theabsence et the housewife, boils overputting out the gas 'liame from burner l2. stantcooling and consequent shortening of rod 35 which results in retractionof tip 37 from engagement by valve head 33 permitting dropot the valve head and the valve k32 and instantstoppage ofsupply of `gas to The absence of the. flame causes anl in-v provided with a reduced discharging end al. In employing my valve as a lighter a stopplate 42, substantially in the shape of an inverted U, is employed, the legs 43 and ele of which are spaced apart a distance sutiicient to permit rotation of the valve head 33 Within deiined limits. In employing my improved valve as a lighter the nut 31 is set at such a height that a very small quantity ol" gas passes continually throughk the reduced discharge end 41 of the. .attenuated tip, 39, maintaining `What is customarily termed a piloty light. As will be seen by dotted lines in Fig. l, the stop plate 42 permits a considerable swing of the tip v39, suiiicient to permit it to be aimed at one ofthe burners in the top of the stove.` Toignite any one of the burners'lQ the operator elevates the valve 3%, valve head 33l and tip 39 `manually from their position of rest `upon nut 31 which increasesthe supply of gas to the tip 39,'producing a long jet of flame..

This long llame is directed at the Vburner which it is desired to light, and subsequently n will be understood that one skilled in the art may make modifications thereof Without departing `trom the spirit of the invention. I Wish, therefore, not to be restricted to the preciseembodiment shown, exceptY in so far as the Ysame is limited in the appended claims.

I claim:

l. The combination with a gas burner and a source ot gas supply therefor including an upright pipe, of a valve head slidably mounted upon said pipe, a gas jet carried by said head, the upper end ofl said kpipe being i formed with a seat, a valve carried by the head and adapted to close said seat When the head isfin lower position, and a thermostatic rod anchored at the rear end of said burner traversing the flame area of the burner and terminating in Yproximity to said head. i

2. The combination with a vertically-disposed gaspipe provided VWith a valve seat in its upper end, of a yvalve head telescoping over said pipe and carrying an internal valve adapted to close said seat, there being a gas discharge` duct communicating With the interior of said head at a point above the valve; a fixed gas burner fed `trom said head and an eXpansible rod anchored at one end,

traversing the Haine area of said burner, and body, and a sheet metal sp1-ing slightly having its opposite end positioned to contact tensed Within said aperture, the internal diwith said valve head in the heated condition ameter of the coiled spring being slightly l0 of the rod. y less than the external diameter of said rod. 5 3. In a controller for gas valves the com- In testimony whereof I have affixed my bination with an expansible rod, of a tip signature. v

therefor comprising an apertured rubber JOI-IN A. L. DETERS.

Copies of this patent maybe obtained for ive cents each, by addressing the Commissioner ot Patents.

Washington, D. 6. 

